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. 2016 Nov 29;6:38179. doi: 10.1038/srep38179

Table 1. Effect of the addition of serum, hemoglobin, hemin and peroxidase to BHI-2 agar on the antagonistic activity of commensal species.

    Serum Hemoglobin Hemin Peroxidase
+ + + +
S. oralis Aa 2,04 ± 0,07 0,62 ± 0,17* 2,08 ± 0,27 1,33 ± 0,21* 2,35 ± 0,23 0,67 ± 0,03* 2,31 ± 0,38 0,00 ± 0,00*
Pi TI 1,43 ± 0,08* TI 2,71 ± 0,25* 3,63 ± 0,81 0,46 ± 0,20* TI 0,00 ± 0,00*
Pg TI 1,37 ± 0,11* 4,36 ± 0,37 2,58 ± 0,24* 2,23 ± 0,02 0,00 ± 0,00* 2,67 ± 0,16 0,00 ± 0,00*
S. sanguinis Aa 3,04 ± 0,04 1,45 ± 0,17* 2,67 ± 0,42 1,94 ± 0,21* 2,70 ± 0,25 1,14 ± 0,03* 3,08 ± 0,57 0,00 ± 0,00*
Pi TI 1,29 ± 0,07* 3,37 ± 0,14 1,41 ± 0,28* 2,75 ± 0,32 0,25 ± 0,19* TI 0,00 ± 0,00*
Pg 4,58 ± 0,11 0,78 ± 0,15* 3,04 ± 0,12 2,17 ± 0,05* 2,63 ± 0,39 0,00 ± 0,00* 3,65 ±  ± 0,35 0,00 ± 0,00*
S. parasanguinis Aa 1,99 ± 0,04 0,75 ± 0,03* 1,41 ± 0,27 0,47 ± 0,11* 2,52 ± 0,14 0,80 ± 0,02* 1,80 ± 0,24 0,00 ± 0,00*
Pi TI 0,00 ± 0,00* TI 3,05 ± 0,05* TI 3,64 ± 0,10* TI 0,00 ± 0,00*
Pg 2,63 ± 0,24 0,00 ± 0,00* 1,14 ± 0,07 0,71 ± 0,10 1,62 ± 0,12 0,00 ± 0,00* 1,87 ± 0,27 0,00 ± 0,00*
S. mitis Aa TI 2,83 ± 0,09* 5,26 ± 0,85 2,56 ± 0,23* TI 2,37 ± 0,05* TI 0,00 ± 0,00*
Pi TI 1,76 ± 0,05* TI TI TI 1,36 ± 0,29* TI 0,00 ± 0,00*
Pg TI 2,58 ± 0,16* TI TI TI 1,29 ± 0,13* TI 0,00 ± 0,00*
S. gordonii Aa 2,68 ± 0,04 1,05 ± 0,11* 3,07 ± 0,21 2,41 ± 0,26* 3,75 ± 0,07 1,25 ± 0,02* 2,11 ± 0,29 0,00 ± 0,00*
Pi TI 1,20 ± 0,13* TI 2,78 ± 0,08* 4,42 ± 0,52 0,78 ± 0,31* TI 0,00 ± 0,00*
Pg TI 0,24 ± 0,17* TI 3,40 ± 0,15* 3,55 ± 1,02 0,31 ± 0,08* 3,21 ± 0,44 0,00 ± 0,00*
S. cristatus Aa 2,25 ± 0,15 0,94 ± 0,09* 2,00 ± 0,32 1,16 ± 0,18* 1,57 ± 0,06 0,45 ± 0,08* 2,02 ± 0,33 0,00 ± 0,00*
Pi TI 0,82 ± 0,15* TI 2,49 ± 0,44* TI 1,33 ± 0,21* TI 0,00 ± 0,00*
Pg 2,96 ± 0,26 0,00 ± 0,00* 3,05 ± 0,22 1,98 ± 0,24* 1,61 ± 0,15 0,00 ± 0,00* 2,98 ± 0,41 0,00 ± 0,00*

Data represent the magnitude of the zone of inhibition expressed in mm (mean ± standard deviation, n = 3) against A. actinomycetemcomitans (Aa), P. intermedia (Pi) and P. gingivalis (Pg). *Statistically significant decrease of the inhibitory effect from commensal bacteria by serum, hemoglobin, hemin and peroxidase (p < 0.05). TI = Total Inhibition. − = without addition; + = with addition, 0,00 = no inhibition.